Affiliation: | 1. Institute of Medical Microbiology, Immunology and Parasitology – Pharmaceutical Microbiology Section, University of Bonn, Bonn, Germany.; 2. Department of Infectious Diseases, Merck Research Laboratories, Merck & Co., Kenilworth, New Jersey, United States of America.; 3. Kekulé Institute for Organic Chemistry and Biochemistry, University of Bonn, Bonn, Germany.;University of Tubingen, Germany |